AquaOmega’s high-EPA softgel, sold on Amazon as the 5X Ultimate Strength Omega-3, is built around one number: 2,659 mg of EPA per serving. This review reads the Supplement Facts panel line by line, works out the real EPA density and cost, and compares it with two other products at their US prices checked on October 12, 2026.
Disclosure: As an Amazon Associate I earn from qualifying purchases. Some links on this page are affiliate links, which cost you nothing extra. Products are compared using the information on their labels and, where available, published test reports.
What the label says
| Supplement Facts line | Per serving (4 softgels) | Per softgel |
|---|---|---|
| Fish oil | 5,318 mg | 1,330 mg |
| Total omega-3 | 3,456 mg | 864 mg |
| EPA | 2,659 mg | 665 mg |
| DHA | 532 mg | 133 mg |
| Other omega-3 | 265 mg | 66 mg |
| Vitamin D | 20 mcg (800 IU), 100% DV | 5 mcg (200 IU) |
| Servings per container | 30 (120 softgels) | – |
Source: the Supplement Facts panel in the Amazon.com listing, checked October 12, 2026. Per-softgel figures are the serving divided by 4, rounded.
Other ingredients on the label: softgel shell (gelatin, glycerin, purified water), green tea leaf extract, rosemary leaf extract and mixed tocopherol concentrate. The label states it contains fish (anchovy). The listing title calls it a 5X Ultimate Strength oil with high EPA and DHA, vitamin D and no fishy aftertaste; those are the brand’s claims on the listing.
The label math
- EPA per softgel: 2,659 ÷ 4 = 665 mg (664.75).
- EPA density: 2,659 ÷ 5,318 = 50% of the fish oil is EPA.
- EPA to DHA ratio: 2,659 ÷ 532 = 5:1 (5.0).
- EPA + DHA per serving: 2,659 + 532 = 3,191 mg.
- Softgels for 1,000 mg of EPA: 4 ÷ 2.659 = about 1.5 softgels.
- Cost per 1,000 mg of EPA: $42.00 ÷ (30 × 2.659) = $0.53. Cost per serving is $1.40, or $0.35 per softgel.
For the step-by-step method behind this, see the label-math section of our guide to eicosapentaenoic acid (EPA), and for how oil weight differs from EPA weight, From Ocean to Capsule.
How it compares
| Product | Price | Serving | EPA : DHA | EPA per serving | Cost per 1,000 mg EPA |
|---|---|---|---|---|---|
| AquaOmega 5X Ultimate Strength (softgels) | $42.00 | 4 softgels, 30 servings | 5:1 | 2,659 mg | $0.53 |
| Nature’s Way NutraSea (liquid) | $31.66 | 1 tsp, 40 servings | 1.5:1 | 750 mg | $1.06 |
| Nordic Naturals ProOmega (softgels) | $30.70 | 2 softgels, 30 servings | 1.44:1 | 650 mg | $1.57 |
Green = best in that row. All prices are from Amazon.com listings checked October 12, 2026. NutraSea is the 200 mL bottle (40 servings of 1 tsp), listed by a third-party seller. Prices change often, so check the current listing before you buy.
The AquaOmega softgel has the highest EPA per serving and the highest ratio of the three, and it costs the least per milligram of EPA. The NutraSea liquid costs about twice as much per milligram of EPA and needs a spoon, and ProOmega costs about three times as much. Cost per 1,000 mg is only one input: oil form, freshness and testing matter too.
Who it suits, and what to watch
In its favor
- 2,659 mg EPA per serving at a 5:1 ratio
- About 50% EPA density, versus 18% in a standard oil
- Lowest cost per 1,000 mg EPA of the three compared
- Includes 800 IU of vitamin D
Worth knowing
- 4 softgels a day is a lot of pills for some people
- Gelatin shell, so it is not vegan (see the vegan omega-3 guide)
- The vitamin D adds to anything else you take
Dose and safety
For general dose ranges, see the omega-3 dosage guide. To see how third-party test reports are read, the IFOS report steps are covered in the Nordic Naturals vs Carlson comparison.
Verdict
If you want a high-EPA oil and value cost per milligram of EPA, the AquaOmega 5X Ultimate Strength softgel is the best value of the three products compared here at these prices: 2,659 mg EPA per serving at about 5:1 for about $0.53 per 1,000 mg. The trade-offs are four softgels a day and a gelatin shell. If you want a plant-based or lower-dose option, look elsewhere.
Check availability on Amazon
Frequently asked questions
How much EPA is in AquaOmega 5X Ultimate Strength?
The Supplement Facts panel lists 2,659 mg of EPA per serving of 4 softgels, which is about 665 mg per softgel, along with 532 mg of DHA.
What is the EPA to DHA ratio?
2,659 mg of EPA to 532 mg of DHA is about 5:1 (4.998 to 1).
How many softgels do I need for 1,000 mg of EPA?
About 1.5 softgels, since each softgel has roughly 665 mg of EPA. The label serving is 4 softgels.
Is it vegan?
No. The softgel shell contains gelatin and the oil is from fish (the label states anchovy). For a plant-based source, see the vegan omega-3 guide.
Sources
- AquaOmega 5X Ultimate Strength Omega-3 softgels, Amazon.com listing (title, price, Supplement Facts and other ingredients), checked October 12, 2026; AquaOmega high-EPA collection (brand site).
- Amazon.com listings checked October 12, 2026: Nutra Sea (200 mL; Supplement Facts per 1 tsp) and Nordic Naturals ProOmega (60 count; Supplement Facts and ingredients per 2 softgels).
- NIH Office of Dietary Supplements, Omega-3 Fatty Acids: Fact Sheet for Health Professionals (FDA 5 g/day, atrial fibrillation). FDA letter on EPA and DHA omega-3 fatty acids (Docket FDA-2014-Q-1146).
Last updated October 17, 2026. Product details come from the manufacturer’s label and retailer listings; prices were checked on October 12, 2026 and change often. This article is general information, not medical advice. Talk to your doctor before starting a high-dose omega-3 supplement, especially if you take blood thinners, have a heart rhythm condition, are pregnant or have a fish or shellfish allergy.